Grinding-machine.



M.'BERFI ELD. GRINDING MACHINE.

APPLICATION FILED JUNE l5. I914.

masszm IfvlllllllflllIdvvfirlllflllidllllllllil Patented June 22, 1915.

I wiwhaeooao horse shoes. Another ob ect of the inventlon is to con- MONTGOMERY BERIFIELD, OF VERGAS, MINNESOTA.

GRINDING-MACHINE.

T all whom it may concern:

Be it known that I, MONTGOMERY Brie tain new and useful Improvements in Grinding-hlachines, of which the following is a specification.

This invention relates to a grinding machine and the principal object of the invention is to provide a grinding machine which can be used for grinding the knivesof farming implements or for any other suitable purpose, such as for grinding the calks of struct the grinding device that it may be turned at any angle desired when using the same, thus permitting it to be very conveniently used.

Another object of the invention is to provide an improved type of protecting cover for the handle of the grinding'machlne, the cover protecting the hands of the user and preventing them from being injured or chilled by grasping the cold handle of the grinding machine.

This invention is illustrated in the accompanying drawings, wherein,

Figure 1 is a view showing the grinding machine in elevation; and Fig. 2 is-a view showing the grinding machine partially in longitudinal section and partially in elevation.

The grind stone which may be formed of emery or any other suitable material is I 16 of the bearing head engaging the bear-r ing balls 17 mounted in the cup 18 of the mounted upon the outer end portion of theshaft 11 and is securely held in place by means of a nut 12 which forces it into tight engagement with the collar 13 ef the bearing head 14. This shaft 11 extends through the hollow handle 15 with the beveled face handle. The opposite end portion of the shaft 11 passes through the sleeve 19 which is mounted in the'handle 15 and has its outer end portion provided with a head 20 in which there is formed a cup 21 to receive the bearing balls 22. A gear 23 is mounted upon the shaft 11 and is provided wlth a neck 24:, the inner end of which is beveled as shown at 25 to form a bearing surface engaging the bearing balls 22. 'Tt will thus be seen that the shaft 11 will be rotatably mounted within the handle and will rest Specification of Letters Patent.

' Patented June 22, 1915.

Application filed June 15', 1914. ScrialNo. 845,309.

upon the bearing balls 17 and 22 and be held in spaced relation to the handle 15 and sleeve 19. This will cause the shaft to ro- Zate very freely when the device is in operaion.

A driven shaft 26 which is rotated by any suitable means through the medium' of a flexible shaft (not shown) extends through a sleeve 27 and is provided with bearing heads 28 and 29 which engage the bearing balls 30 and 31 mounted in the cups 32 and 33 of the sleeve 27. Thebearing head 29 forms the neck of the gear 34 which is p01 sitioned in the head 35 of the sleeve 27. This head 35 is very similar to the head 20 and is pivotally connected with the same by means of oppositely disposed pins 3Gwhich pass through eyes 37. It should be noted that the heads 20 and 35 are cut off at one side as clearly shown in the drawings so that the handle 15 may be moved at varying angles with respect to the sleeve 27 It should also be noted that the teeth of the gears 23 and 34 will at all times remain in intermeshed relation and that therefore the shaft 11 will be rotated at all times whenever the shaft 26 is rotating.

In order to protect the-hands of the operator there is provided a jacket 38 which is formed of leather or any other suitable material and is placed upon the handle with its edge portions overlapping, thus bringing the eyelets 39 into alinement. A lacing 40 is passed through the eyelets .39 as shown in Fig. 2 and holds, the'jacket in the position shown so that the head 14 of the shaft 11 will be covered, thus preventing any danger of the operators fingers being injured by coming in contact with this head. In order to securely hold the jacket in the desired position upon the handle there is provideda screw {11 which extends between the leaves 42 of the jacket into the handle with its head engaging the jacket and securely holding the same in place. This protector not only prevents the fingers of the operator from coming in contact with the head 14 but also makes it unnecessary for the operator to take hold of the handle 15 which would be very cold in cold weather.

When in use, the operator grasps the jacket 38 and thus v supports the handle so that the handle may be turned at the desired angle and held in the proper position to bring the grind stone 10 into engagement with the cutting edge of the implement i 'which it is desired to sharpen or into engagenient-with that portion of any device which it is desired to grind. The shaft 26 which .is rotated by any suitable device through the medium of a flexible shaft causes the shaft 11 to rotate through the medium of the gears 23 and 34:, thus rotating the grind stone carried by the shaft 11.

What is claimedis':-' 1. A grinding device of the character described comprising a hollow handle, a sleeve mounted in one'end of said handle, a head for said sleeve, said sleeveand handle being provided with bearing cups, bearing balls mounted. in said. cups, a, shaft passing through said handle and having one end portion provided-with a bearing head enshaft Within the head of said sleeve and pro gaging the-bearing balls mounted in the cup of said handle, a-grinding stone carried by theouter' end portion of said shaft, a gear carriedjby the opposite end portion ofsaid vided with a neck teianifiati g in a bearing face engaging the bearing alls'positioned inthe cup of said sleeves, a second sleeve having its end portions provided with bearing cups, ahead carried by said second sleeve and pivotally connectedwith the head of said first mentioned sleeve, bearing-balls mounted in the cups of said second sleeve,

-"a shaft extending through said second sleeve and provided with a collar having a bearing face engaging the bearing bajlls'in one of ried by said handle, a second sleeve. pivotally a the. cups of said second sleeve, and a gear carried by" said secondshaft and meshing. with said first mentioned gear andprovided Y with a neck terminating in-a bearing'surface engagingthe bearingballs-mounted inthe second cupof said second sleeve;

2. A grinding device .of the character. described comprising a handle, a sleeve cari connected'with said first mentioned sleeve, a

shaft rotatably mounted in said handle and said first mentioned; sleeve, a second shaft rotatably' mounted -in said second-sleeve,

' gears carried by said shaft and having their I teeth internieshingto'cause rotary motion I -of said second mentioned-shaft 'to'be transing medium carried by'the outer-end por- --tion of-said first mentioned shaft, a jacket mitted to said first mentioned shaft, a grind-.

I v for said handle extending beyond the. same and'j'extending about said first mentioned V V shaft and means for securing said jacket in a I desiredposition upon said handle.

.aiea'eea 3. A grinding device of the character described omprising a handle, a rotatable shaft extending through said handle, a grinding medium carried by said shaft, a jacket for said handle surrounding the same having its longitudinal edge portions positioned in overlapping relation and provided shaft, a jacket for saidhandle, means for connecting theedge portions of said jacket to hold the same about said handle, means for securing said jacket in a desired ositionupon-said handle against accidenta displacement, and means for rotating said shaft. v

5. A grinding device comprising a handle, a rotatable shaft, mounted in said handle 'and extending beyond the forward end .thereof, a grinding medium-carried by the outer end portion of said shaft, and a jacket constructed separate IflOlIl the handle carried by said handle and extending beyond the forward end thereof and positioned aboutthe outer end portion of said shaft between said handle and grinding medium,

.and means to prevent longitudinal displace ment of the jacket.

6. A grinding device comprising a handle,

va' sleeve carried by said handle and provided with a head, a driven shaft rotatably mounted in said handle and sleeve, a grinding medium carried by said driven shaft, a gear carried by said driven shaft and positioned. within'the head of said sleeve, a second sleeve having a head nected with the head of said rst'mentioned sleeve, a' driving sh'aft' rotatably mounted in the second sleeve, and a gear carried by the driving shaft within the head of the second sleeve and meshing with the gear of said driven shaft.

In testimony whereof I afiix my signature in presence of two witnesses.

MONTGOMERY BERFIELD,

Witnesses:

CHAs. A. PETERSON,

Lonwm.

ivotally con-' 

